Molecular Basis of Inheritance — NEET Biology

Molecular Basis of Inheritance covers DNA as the genetic material, its structure and packaging, replication, transcription, the genetic code, translation, and the regulation of gene expression, closing with the Human Genome Project and DNA fingerprinting. Questions mix straight recall of experiments with applied reasoning about codons and enzymes.

324
Practice questions
13
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9
Topics covered

Topics in Molecular Basis of Inheritance

Molecular Basis of Inheritance — NEET questions with answers

8 worked examples from our bank of 324. Answers and explanations are below each question.

1
Which of the following nitrogenous bases are common for both RNA and DNA?
  1. A C, G, A
  2. B G, A, U
  3. C T, A, C
  4. D U, A, C
Show answer & explanation

Correct answer: A

$\mathrm{Pu} \longrightarrow \mathrm{A}, \mathrm{G} \quad \mathrm{Py} \longrightarrow \mathrm{C}$ are common nitrogenous bases for both RNA and DNA.
2
Adjacent nucleotides in a polynucleotide chain are joined by
  1. A N-glycosidic bond
  2. B Phosphodiester bond
  3. C O-glycosidic bond
  4. D Hydrogen bond
Show answer & explanation

Correct answer: B

Molecular Basis Of Inheritance – NEET-9928
3
Haploid content of human DNA contains
  1. A $4.6 \times 10^{6} \mathrm{bp}$
  2. B $3.3 \times 10^{8} \mathrm{bp}$
  3. C $6.6 \times 10^{9} \mathrm{bp}$
  4. D $3.3 \times 10^{9} b p$
Show answer & explanation

Correct answer: D

$3.3 \times 10^{9} \longrightarrow$ Human genome
4
Cytidine is a
  1. A Nucleoside
  2. B Nitrogen base
  3. C Nucleotide
  4. D Common dinucleotide in DNA and RNA
Show answer & explanation

Correct answer: A

Molecular Basis Of Inheritance – NEET-9931
5
Which of the following processes is related to reverse transcription?
  1. A DNA dependent DNA synthesis
  2. B RNA dependent DNA synthesis
  3. C DNA dependent RNA synthesis
  4. D RNA dependent polypeptide synthesis
Show answer & explanation

Correct answer: B

Molecular Basis Of Inheritance – NEET-9932
6
Which of the following structures are present in core particle of nucleosome?
  1. A Octamer of histone proteins
  2. B 200 bp of DNA
  3. C Non-histone proteins
  4. D Linker DNA
Show answer & explanation

Correct answer: A

Molecular Basis Of Inheritance – NEET-9933
7
Packaging of DNA helix
  1. A Involves polyamines in eukaryotes
  2. B Occurs with the help of NHC proteins only
  3. C Requires acidic proteins that help in coiling of DNA in prokaryotes
  4. D Is more complex in eukaryotes than prokaryotes
Show answer & explanation

Correct answer: D

Nucleosome model
8
Length of DNA in E. coli is
  1. A 2.2 m
  2. B 1.36 mm
  3. C 1.36 m
  4. D 3.4 m
Show answer & explanation

Correct answer: B

$4.6 \times 10^{6} \times 0.34 \mathrm{~mm}=1.36 \mathrm{~mm}$

316 more questions in this chapter, with timed tests and per-topic accuracy tracking.

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Molecular Basis of Inheritance — free practice tests (DPPs)

Each test is a timed set of questions from this chapter. Free to attempt.

Molecular Basis Of Inheritance — DPP 1
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Molecular Basis Of Inheritance — DPP 2
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Molecular Basis Of Inheritance — DPP 3
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Molecular Basis Of Inheritance — DPP 4
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Molecular Basis Of Inheritance — DPP 5
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Molecular Basis Of Inheritance — DPP 6
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Molecular Basis Of Inheritance — DPP 7
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Molecular Basis Of Inheritance — DPP 8
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Molecular Basis Of Inheritance — DPP 9
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Molecular Basis Of Inheritance — DPP 10
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Molecular Basis Of Inheritance — DPP 11
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Molecular Basis Of Inheritance — DPP 12
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Molecular Basis Of Inheritance — DPP 13
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Molecular Basis of Inheritance — frequently asked questions

Which experiments are most asked from this chapter?

The Griffith transformation experiment, the Avery–MacLeod–McCarty follow-up and the Hershey–Chase blender experiment appear repeatedly, usually as 'what did this prove' questions.

How much of the lac operon do I need?

Enough to trace the state of each gene with and without lactose present, and to name the repressor, the inducer and the structural genes.

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